@guinan Doing some research, it looks like Arabic numerals replaced Roman numerals in science because they were a lot more convenient for the numbers scientists had to deal with.Centuries are small numbers, so that was not an issue.

@guinan The French Republican calendar (created in the 18th century) uses Roman numerals for years as well, but it was in use for less than two decades, so they never had to deal with large year numbers.

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